**Brand:** Telebit Corporation (Mountain View, CA)

**Model:** T2500 / T25SA

**Type:** Vintage Professional External Dial-Up Modem

**Country of Manufacture:** Made in USA (1989)

**Condition:** Vintage / Untested (As-Is)

### Description:

Up for sale is a legendary piece of networking history — the Telebit T2500 (Model T25SA) external dial-up modem. Released in the late 1980s, Telebit modems achieved cult status among sysops, Unix administrators, and early FidoNet users due to their revolutionary PEP (Packet Ensemble Protocol). This proprietary technology allowed incredible stability and blazing fast data transfer speeds even over notoriously noisy, poor-quality telephone lines.

Featuring a heavy-duty industrial chassis with a sleek ribbed top design, this professional-grade modem is a fantastic addition to any vintage computer setup, server rack, or tech museum collection.

### Front Panel Indicators:

Features high-visibility LED diagnostic status lights including:

* PEP (Packet Ensemble Protocol)

* CD (Carrier Detect)

* OH (Off Hook)

* RD / SD (Receive / Send Data)

* CTS / DTR / MR

### Condition Details:

* **Cosmetics:** Good vintage condition. The housing shows beautiful original color with minimal yellowing and light cosmetic scuffs consistent with its age (please see detailed pictures). All labels and logos are intact and perfectly readable.

* **Functional Status:** Untested. Power supply and cables are NOT included. Selling strictly "As-Is" / for parts or collection revival.

### Shipping & Handling:

Will be securely wrapped in anti-static materials and packed inside a sturdy box with thick padding to prevent any damage during transit. Fast and reliable international shipping available.